- Academic Journal Catalogue (AJC)
- American Mathematical Society (AMS)
- AMS Digital Mathematics Registry
- BASE | Bielefeld Academic Search Engine
- China Academic Journals Full-text Database
- China Century Journals Full-text Database (Archive)
- China Doctor Dissertations Full-text Database
- China Master Dissertations Full-text Database
- China Proceedings of Conference Database
- China Core Newspapers Full-text Database
- China Yearbooks Full-text Database
- China Statistic Yearbooks Full-text Database
- China Reference Works Online
- China National / Industrial Standards Full-text Database
- China/World Patents Database
- China National Scientific Reports Database
- China Books Full-text Database
- China Citations Database
- CiteSeerx
- CNKI Scholar
- Cobiss
- Crossref
- EBSCO
- EBSCOhost | Academic Search Research and Development
- EBSCOhost | Applied Science and Technology Source
- EBSCOhost | Engineering Source
- EBSCOhost | TOC Premier™
- Electronic Journals Library
- Genamics JournalSeek
- Google Scholar
- Index Copernicus-ICI Journals Master List
- InfoBASE Index
- Inspec | The IET
- MathSciNet®
- Microsoft Academic Search System
- RoMEO Database | University of Nottingham, UK
- SAO/NASA Astrophysics Data System
- SCIRUS
- SCOPUS
- Semantic Scholar
- SWETS
- The Collection of Computer Science Bibliographies
- The Informatics Portal io-port.net
- TIB|UB | German National Library of Science and Technology
- Ulrich's International Periodicals Directory
- WorldCat OCLC
- Zentralblatt MATH
- Zetoc Mimas | The University of Manchester
